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A. DAVIS, JR- OIL WAGON TANK. APPLICATION FILED JUNE 22; 1914.

Patented J 1113 29, 1919.

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AUGUSTINE DAVIS, JR, 0]? CINCINNATI, OHIO.

on. WAGON-TANK.-

To all whom it may concern:

Be it known that I, AUGUSTINE DAVIS, Jr., a citizen of the UnitedStates, and a resident of the city of Cincinnati, in the county ofHamilton and State of Ohio, have invented certain new and usefulImprovements in Oil Wagon-Tanks, of which the following is a full,clear, and exact description, reference bein had to the accompanyingdrawings, forming part of this specification.

My invention relates particularly to oil tanks used on wagons, whereinthe oil-tight uniting of parts together is a necessity, and wherelightness of construction without sacrificing strength, is a greatdesideratum. The object of my invention is to' provide tanks of thischaracter in' which the sheet metal may be of light gage, and in whichoXy-acetylene or similar autogenous Welds are used, with all weldsexterior welds and all parts Weldable together without causing buckling.One of the special objects is to provide a plurality of compartments insuch tanks with the strain on the welds reduced to a minimum by the tankstructure. In riveted tanks it is impossible to use sheet metal oflighter gage than twelve to fourteen, because -rivets will not hold thesheets in tanks of light gage, and my parts are Welded throughout toovercome this difficulty of the art. In riveted tanks, also, jars andblows are liable in time to start seams and rivets and allow leakage.

The objects above mentioned and other advantages as will be indicated,are accomplished by that certain construction and arrangement of partsto be hereinafter specifically'pointed out and claimed.

In the drawings,

Figure 1 is a side elevation of a double compartment wagon tank, partlyin vertical section.

Fig. 2 is a vertical section showing the weld of shell to end andcompartments heads, drawn in full size.

Fig. 3 is a central vertical section of a filler opening.

Fig. 4: is a similar view of an outlet.

The tank shown has compartments 1 and 2, formed of thin sheet metalshells 3 and 4. In each shell is a filler opening 5, and an outletopening 6. These two openings may both be attached in the same manner,but are not so shown in the drawing. The shells are flanged outwardly at7, 8, to give additional strength. The corners are rounded, also, to

Specification of Letters Eatent. Patented Jelly 29, 1919. Applicationfiled June 22, 1914. Serial No. 846,444.

avoid sharp edges and hence strain on the metal. Inasmuch as standardopenings are to be used both for saving in cost of manufacture andbecause it is desired to have the fittings of'substantial stock, quite aproblem is presented of welding a large heavy fitting to a thin shell,without buckling the sheet or distorting the fitting. Ordinarily it isnot practical to weld a heavy fitting to a thin sheet with any greatdegree of success, because of excessive cost and a poor Weld. It issolved here, by turning out to a thin edge 9 the lapping portion of theinlet opening fitting. The weld 10 can then be made without anydifiiculty, at the edge of the flanged shell. The fitting will then beoil-tight, and permanent.

This is not necessary in the smaller outlet fittings, and I have shown amodified'way of securing them in the bottom of the shells. The, lappingportion of the fitting is not turned, but aweld 11 is made at the edgeof the fitting inside of the tank, and a weld '12 at the edge of theflange of the shell. By

this means I can securely fasten the smaller fitting to the shellwithout the expense of turning it down to a finer edge. It will beunderstood, however, that the gage of this smaller fitting in standardsizes is considerably smaller than that of the filler inlet fitting. Ifthis method of setting in the outlet is adopted, there is, of course, anexception to the statement that all welds in the tank are outside welds.

In setting in the various heads to form tanks and compartments, in thecylindrical shells it is desired to avoid the troublesome flanging ofthe shells. It is desired to avoid inside welds, and confine allfianging to the heads. It is desired to have straight pulls on all weldsand to form compartment heads so that a bulging in one compartment willnot afiect the other compartment. It is also desired to separate thecompartments so thatleakage out of one -will not get into the other andadulterate the contents thereof.

The shells 3 and 4 are maintained unflanged at their ends, and theiradjacent ends are spaced apart.- The forward head 13 having the seat cutout, is flanged at 15, the flange lapped under the end-of the shell, andweld 16 made at the edges of the shell. The rear head 14 is mounted in alike manner, and for convenience the same reference numerals applied toflange and weld. The shells are not buckled at all in putting to pro- 7set in place in the shell, they will be sepa- .at the edge of rated bythe length of the portion 19.

The welds are made as follows: a weld 21 each shell where it laps theportion 19, and the weld 22 at the adjacent edges of the portionsQO.These welds are thus separated for each compartment and there is no weldbetween the two, the opening of which would lead to adulteration. Thereis double strength over a single partition wall, and the welds '21 and22 are protected by the spring in the flanges 20.

The heads are put together with their respective shells first welded,and then tested before joining the two compartments together. The weld22 is then made and being away from the outside line of the tank, it canbe put in, without tending to throw a buckling strain on the shell, andalso without throwing unusual strain on the welds 21. The tank isdesigned primarily for mounting on a wagon, but no such showing is madeas it forms no part of my invention. The construction of my tankentirely by oxy-acetylene welding and the method of putting in the'fittings makes a practically seamless tank which may be decidedlylighter than tanks which are held at any point by rivets. I

for each department,

ing toward each other and their double partition-forming walls spacedapart, the ends of the shells lapping over the flanges of said. headsbeing united thereto by eX- ternal welds, and the edges of said flangesbeing turned outwardly and united by another Weld. v

3. A safety compartment wagon tank, comprising a plurality of shells,flanged heads inserted into adjacent ends of said shells with theirflanges extending toward each other and their double-partition-formingwalls spaced apart, external welds uniting the ends of the shells to theflanges over which they lap, contiguous outturned flanges on the edgesof the main flanges, and a weld uniting said outturned flanges.

4:. A safety compartment wagon tank, comprising a plurality of shells,and flanged heads welded into the adjacent ends of the shells with theirflanges extending into contiguity and welded to each other and theirdouble-partition-forming walls spaced apart.

AUGUSTINE DAVIS, J R.

Witnesses:

THOMAS BENTHAM, KATHERINE SMITH.

